Question

what is ultra sound and violet??????​

Answer 1

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Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" sound in its physical properties, except that humans cannot hear it. This limit varies from person to person and is approximately 20 kilohertz in healthy young adults

Answer 2

Answer:

Medical ultrasound is a diagnostic imaging technique, or therapeutic application of ultrasound. It is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs. Its aim is often to find a source of a disease or to exclude pathology.

Violence is "the use of physical force so as to injure, abuse, damage, or destroy". Less conventional definitions are also used, such as the World Health Organization's definition of violence as "the ...